<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script>
        var arr = [0, 3, 5, 6, 0, 0, 0, 12];
        var arr1 = [];
        for (var i = 0; i < arr.length; i++) {
            if (arr[i] == 0) {
                continue;
            } else {
                arr1[arr1.length] = arr[i]
            }
        }
        console.log(arr1);
    </script>
</head>

<body>

</body>

</html>